Hi Glenn, If there is a way to share FBO's between osg::Camera I don't know of it off the top of my head. You'd need to look at the src/osgUtil/RenderStage.cpp so see how it sets up the FBO's. It's able to ruse it's own FBO on subsequent frames so there may be a way for forcing it to use an existing FBO.
Robert. On 10 May 2018 at 14:02, Glenn Waldron <[email protected]> wrote: > Hi Robert, > > I have a scenario that uses multiple RTT cameras. (The approach is similar > in concept to CSM - Cascading Shadow Maps - where you compose a texture > using multiple frustums). Each RTT camera renders to a different layer of a > Texture2DArray. This works great! However, it uses a lot more memory than I > was expecting. > > I realized that each osg::Camera creates its own separate FBO, resulting in > a lot of extra memory usage. Since the cameras render sequentially, it makes > sense for all the RTT cameras to just re-use a single FBO. Is there any way > to make that happen in OSG? Any other suggestions? > > Glenn Waldron / osgEarth > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
